All of data/ folders are gone from trunk

[Albert Astals Cid]

They contained files specific per app, those files have been moved back to the 
repositories of the app themselves.

Not being .po files it made little sense to keep that data in svn (it's not 
like it was being updated often by translators often either) and it made 
releasing quite more complicated.

If you're curious of which files it was and where they went 
  https://phabricator.kde.org/T13618 
should have all the info.

If there's something you don't understand please don't hesitate to ask.

Cheers,
  Albert